package simple; /**
 * @projectName study-note
 * @package PACKAGE_NAME
 * @className PACKAGE_NAME.MergeLinkList
 */

import node.ListNode;

/**
 * MergeLinkList
 * @description 合并两个有序链表
 * @author answer_wx
 * @date 2022/6/30 17:05
 * @version 1.0
 */
public class MergeLinkList {
    public ListNode mergeTwoLists(ListNode list1, ListNode list2) {
        if (list1 == null) {
            return list2;
        }
        if (list2 == null) {
            return list1;
        }
        if (list1.val <= list2.val) {
            list1.next = mergeTwoLists(list1.next, list2);
            return list1;
        } else {
            list2.next = mergeTwoLists(list2.next, list1);
            return list2;
        }
    }
}

